65555660 has 24 divisors (see below), whose sum is σ = 142415280. Its totient is φ = 25317824.

The previous prime is 65555657. The next prime is 65555671. The reversal of 65555660 is 6655556.

It is a happy number.

65555660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55934 + ... + 57093.

It is an arithmetic number, because the mean of its divisors is an integer number (5933970).

Almost surely, 2^65555660 is an apocalyptic number.

It is an amenable number.

65555660 is an abundant number, since it is smaller than the sum of its proper divisors (76859620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65555660 is a wasteful number, since it uses less digits than its factorization.

65555660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113065 (or 113063 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 65555660 is about 8096.6449841894. The cubic root of 65555660 is about 403.2150477687.

The spelling of 65555660 in words is "sixty-five million, five hundred fifty-five thousand, six hundred sixty".